Abstract
High entropy alloys (HEAs) emerged in the beginning of XXI century as novel materials to “keep-an-eye-on”. In fact, nowadays, 16 years after they were first mentioned, a lot of research has been done regarding the properties, microstructure, and production techniques for the HEAs. Moreover, outstanding properties and possibilities have been reported for such alloys. However, a way of jointing these materials should be considered in order to make such materials suitable for engineering applications. Welding is one of the most common ways of jointing materials for engineering applications. Nevertheless, few studies concerns on efforts of welding HEAs. Therefore, it is mandatory to increase the investigation regarding the weldability of HEAs. This work aims to present a short review about what have been done in recent years, and what are the most common welding techniques that are used for HEAs. It also explores what are the measured properties of welded HEAs as well as what are the main challenges that researchers have been facing. Finally, it gives a future perspective for this research field.
Highlights
High entropy alloys (HEAs) emerged in the beginning of this century as promising materials for engineering applications
3 showsThe thathigh the concentrated laser weld resulted in alaser microstructure of thecreate welding zone heat affected zone in the material and allow for high welding rates to be achieved in comparison to (WZ) with a lower degree of Al-Ni segregation in comparison with the base metal zone (BM)
Regarding solid-state welding techniques for HEAs, Zhu et al [29,30] discussed the possibility of using friction-stir welding (FSW) as welding technique to obtain sound joints in HEAs
Summary
High entropy alloys (HEAs) emerged in the beginning of this century as promising materials for engineering applications. The investigation of the alloy can be welded or joined without degradation, whether that is detrimental to the weldment microstructure or properties (during/after welding) and for the duration of intended service, is mandatory for its potential use as an engineering material for structural applications [22]. In this context, this short-review objective is to cover what has been reported on HEAs welded so far, including the influence of the welding techniques and the parameters in the material’s properties and microstructure, as well as to critically assess the achievements reported and outlook what of is yet to come in future years
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